Strengthening of the Restored Surface Layer of Steel Parts 45 by Laser Boring

  • Authors

    • Oleg Cherneta
    • Vadim Kubich
    • Roman Voloshchuk
    • Vladimir Averyanov
    • Dmytro Shmatko
    • . .
  • borides, laser treatment, microhardness, relationships, technologies.
  • By means of the proposed technologies, the relationship and strengthening of the optimal modes of recovery of the restoring layer and the optimal laser treatment modes with bat-retaining straps are chosen. The microstructural, X-ray diffraction studies of the restored surfaces of the cams of the distributing shaft of the car were determined, the wear resistance and microhardness of the working surfaces were determined. By means of the proposed technologies of restoration and strengthening, optimum modes of applying the restoring layer and optimal modes of laser treatment (pumping energy of 20 kJ without melting of the surface) with bat-retaining coatings (thickness 2 mm) were chosen. The unevenness of the pulsed laser treatment with the restriction of the diameter of the laser spot and the treatment of a boron-rich surface layer with overlapping of the corresponding zones leads not only to the quenching but also to the release of individual local microparticles. New phases such as boron carbide, carbides - borides, iron borides, and others are formed. The strengthened surface layer has a complex structure and generally contains a martensite base with thin layers of borides, Ñarbides. The microhardness of the processing zone rises 3-4 times (Ðμ 6500-7000 MPa).



  • References

    1. [1] Marchenko A.P., Shekhovtsov A.F., Internal combustion engines: Development of constructions of forced engines of ground transport vehicles, Kharkov: Flag, (2004), pp: 126– 134.

      [2] Fransenyuk I.V., Fransenyuk L.I., Album of microstructures of cast iron, steel, non-ferrous metals and their alloys, -M.: ICC "Akademkniga", (2004), pp: 88-96.

      [3] L.S. Malinov, â€Differential treatment of alloys to enhance their properties is a promising direction in material scienceâ€, New materials and technologies in metallurgy and mechanical engineering Scientific journal, No.2, (2012), pp: 50-56.

      [4] Motovilin G.V., Masino M.A., Suvorov O.M., Automotive materials: Directory, M.: Transport, (1989), pp: 352– 364.

      [5] Gorelik S.С. X-ray and electron-optical analysis, M.: MISIS, (1994), pp: 108– 128.

      [6] O.B. Lysenko, â€Kinetics of formation of metostability of crystalline and amorphous phases during tempering from a melt and laser fusion of a surfaceâ€, Abstract for the degree of Doctor of Physical and Mathematical Sciences, Dnipropetrovsk, (2009), pp: 26-28.

      [7] Mirkin L.I., Handbook on X-ray Structural Analysis of Polycrystals, - M.: Ph.-mat. Lit, (1961). pp: 358– 364.

      [8] Cherneta O. G., Burya O.I., Naberezhna O.O., Voloshchuk R.G., â€Technology of restoration and strengthening of the surface layer of machine partsâ€, Materials of the VIII international scientific and practical conference "Integrated quality assurance of technological processes and systems", Vol. 1, (2018), pp:100-102.

      [9] Cherneta O.G., Sukhomlin V.I., Voloshchuk R.G., Sereda B.P., â€Investigation of microstructure of worn parts of automobiles from steel 45 at restoration and repeated thermal treatmentâ€, Collection of scientific works "Perspective Technologies and Devices", No. 10 (1), (2017), pp: 212-217.

      [10] Cherneta O.G., Sukhomlin V.I., Voloshchuk R.G., â€Mathematical modeling of the degree of wear of the surface layer of parts, depending on load modesâ€, Mathematical Modeling: Scientific Journal, No.1 (38), (2018), 144-149.

      [11] Grigor'yants A.G., Shiganov I.N., Misyurov A.I., Technological processes of laser processing, M.: Izv-MGTU them. N.E. Bauman, (2006), pp: 286-293.

      [12] Baranova L.V., Demkina E.L. Metallographic etching of metals. Directory, Moscow: Metallurgy, (1986), pp: 144– 156.

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  • How to Cite

    Cherneta, O., Kubich, V., Voloshchuk, R., Averyanov, V., Shmatko, D., & ., . (2018). Strengthening of the Restored Surface Layer of Steel Parts 45 by Laser Boring. International Journal of Engineering & Technology, 7(4.3), 71-75.